Start Calculating Metered Savings!

The OpenEEmeter is an open-source program that calculates changes in energy use by comparing a building's energy consumption before and after an upgrade or retrofit. OpenEE's free web app lets you run the OpenEEmeter straight from your browser. Try it out with the sample data provided, or paste in your own data to see how much energy has been saved.

For more information on how the meter works, check out our How it Works page, and see our additional documentation as well as the Github code.